MdeModulePkg/Universal/SmbiosMeasurementDxe/SmbiosMeasurementDxe.c

   1 /** @file
   2   This driver measures SMBIOS table to TPM.
   3
   4 Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
   5 This program and the accompanying materials
   6 are licensed and made available under the terms and conditions of the BSD License
   7 which accompanies this distribution.  The full text of the license may be found at
   8 http://opensource.org/licenses/bsd-license.php
   9
  10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include <PiDxe.h>
  16
  17 #include <Protocol/Smbios.h>
  18 #include <IndustryStandard/SmBios.h>
  19 #include <IndustryStandard/UefiTcgPlatform.h>
  20 #include <Guid/EventGroup.h>
  21 #include <Guid/SmBios.h>
  22 #include <Library/DebugLib.h>
  23 #include <Library/UefiDriverEntryPoint.h>
  24 #include <Library/UefiLib.h>
  25 #include <Library/BaseLib.h>
  26 #include <Library/BaseMemoryLib.h>
  27 #include <Library/MemoryAllocationLib.h>
  28 #include <Library/UefiBootServicesTableLib.h>
  29 #include <Library/TpmMeasurementLib.h>
  30
  31 #define FIELD_SIZE_OF(TYPE, Field) ((UINTN)sizeof(((TYPE *)0)->Field))
  32
  33 typedef struct {
  34   UINT8  Type;
  35   UINTN  Offset;
  36   UINTN  Size;
  37   UINT32 Flags;
  38 } SMBIOS_FILTER_TABLE;
  39 #define SMBIOS_FILTER_TABLE_FLAG_IS_STRING  BIT0
  40
  41 typedef struct {
  42   UINT8                Type;
  43   SMBIOS_FILTER_TABLE  *Filter; // NULL means all fields
  44   UINTN                FilterCount;
  45 } SMBIOS_FILTER_STRUCT;
  46
  47 //
  48 // Platform Specific Policy
  49 //
  50 SMBIOS_FILTER_TABLE  mSmbiosFilterType1BlackList[] = {
  51   {0x01, OFFSET_OF(SMBIOS_TABLE_TYPE1, SerialNumber),         FIELD_SIZE_OF(SMBIOS_TABLE_TYPE1, SerialNumber),         SMBIOS_FILTER_TABLE_FLAG_IS_STRING},
  52   {0x01, OFFSET_OF(SMBIOS_TABLE_TYPE1, Uuid),                 FIELD_SIZE_OF(SMBIOS_TABLE_TYPE1, Uuid),                 0},
  53   {0x01, OFFSET_OF(SMBIOS_TABLE_TYPE1, WakeUpType),           FIELD_SIZE_OF(SMBIOS_TABLE_TYPE1, WakeUpType),           0},
  54 };
  55 SMBIOS_FILTER_TABLE  mSmbiosFilterType2BlackList[] = {
  56   {0x02, OFFSET_OF(SMBIOS_TABLE_TYPE2, SerialNumber),         FIELD_SIZE_OF(SMBIOS_TABLE_TYPE2, SerialNumber),         SMBIOS_FILTER_TABLE_FLAG_IS_STRING},
  57   {0x02, OFFSET_OF(SMBIOS_TABLE_TYPE2, LocationInChassis),    FIELD_SIZE_OF(SMBIOS_TABLE_TYPE2, LocationInChassis),    SMBIOS_FILTER_TABLE_FLAG_IS_STRING},
  58 };
  59 SMBIOS_FILTER_TABLE  mSmbiosFilterType3BlackList[] = {
  60   {0x03, OFFSET_OF(SMBIOS_TABLE_TYPE3, SerialNumber),         FIELD_SIZE_OF(SMBIOS_TABLE_TYPE3, SerialNumber),         SMBIOS_FILTER_TABLE_FLAG_IS_STRING},
  61   {0x03, OFFSET_OF(SMBIOS_TABLE_TYPE3, AssetTag),             FIELD_SIZE_OF(SMBIOS_TABLE_TYPE3, AssetTag),             SMBIOS_FILTER_TABLE_FLAG_IS_STRING},
  62 };
  63 SMBIOS_FILTER_TABLE  mSmbiosFilterType4BlackList[] = {
  64   {0x04, OFFSET_OF(SMBIOS_TABLE_TYPE4, SerialNumber),         FIELD_SIZE_OF(SMBIOS_TABLE_TYPE4, SerialNumber),         SMBIOS_FILTER_TABLE_FLAG_IS_STRING},
  65   {0x04, OFFSET_OF(SMBIOS_TABLE_TYPE4, AssetTag),             FIELD_SIZE_OF(SMBIOS_TABLE_TYPE4, AssetTag),             SMBIOS_FILTER_TABLE_FLAG_IS_STRING},
  66   {0x04, OFFSET_OF(SMBIOS_TABLE_TYPE4, PartNumber),           FIELD_SIZE_OF(SMBIOS_TABLE_TYPE4, PartNumber),           SMBIOS_FILTER_TABLE_FLAG_IS_STRING},
  67   {0x04, OFFSET_OF(SMBIOS_TABLE_TYPE4, CoreCount),            FIELD_SIZE_OF(SMBIOS_TABLE_TYPE4, CoreCount),            0},
  68   {0x04, OFFSET_OF(SMBIOS_TABLE_TYPE4, EnabledCoreCount),     FIELD_SIZE_OF(SMBIOS_TABLE_TYPE4, EnabledCoreCount),     0},
  69   {0x04, OFFSET_OF(SMBIOS_TABLE_TYPE4, ThreadCount),          FIELD_SIZE_OF(SMBIOS_TABLE_TYPE4, ThreadCount),          0},
  70   {0x04, OFFSET_OF(SMBIOS_TABLE_TYPE4, CoreCount2),           FIELD_SIZE_OF(SMBIOS_TABLE_TYPE4, CoreCount2),           0},
  71   {0x04, OFFSET_OF(SMBIOS_TABLE_TYPE4, EnabledCoreCount2),    FIELD_SIZE_OF(SMBIOS_TABLE_TYPE4, EnabledCoreCount2),    0},
  72   {0x04, OFFSET_OF(SMBIOS_TABLE_TYPE4, ThreadCount2),         FIELD_SIZE_OF(SMBIOS_TABLE_TYPE4, ThreadCount2),         0},
  73 };
  74 SMBIOS_FILTER_TABLE  mSmbiosFilterType17BlackList[] = {
  75   {0x11, OFFSET_OF(SMBIOS_TABLE_TYPE17, SerialNumber),        FIELD_SIZE_OF(SMBIOS_TABLE_TYPE17, SerialNumber),        SMBIOS_FILTER_TABLE_FLAG_IS_STRING},
  76   {0x11, OFFSET_OF(SMBIOS_TABLE_TYPE17, AssetTag),            FIELD_SIZE_OF(SMBIOS_TABLE_TYPE17, AssetTag),            SMBIOS_FILTER_TABLE_FLAG_IS_STRING},
  77   {0x11, OFFSET_OF(SMBIOS_TABLE_TYPE17, PartNumber),          FIELD_SIZE_OF(SMBIOS_TABLE_TYPE17, PartNumber),          SMBIOS_FILTER_TABLE_FLAG_IS_STRING},
  78 };
  79 SMBIOS_FILTER_TABLE  mSmbiosFilterType22BlackList[] = {
  80   {0x16, OFFSET_OF(SMBIOS_TABLE_TYPE22, SerialNumber),        FIELD_SIZE_OF(SMBIOS_TABLE_TYPE22, SerialNumber),        SMBIOS_FILTER_TABLE_FLAG_IS_STRING},
  81   {0x16, OFFSET_OF(SMBIOS_TABLE_TYPE22, SBDSSerialNumber),    FIELD_SIZE_OF(SMBIOS_TABLE_TYPE22, SBDSSerialNumber),    0},
  82   {0x16, OFFSET_OF(SMBIOS_TABLE_TYPE22, SBDSManufactureDate), FIELD_SIZE_OF(SMBIOS_TABLE_TYPE22, SBDSManufactureDate), 0},
  83 };
  84 SMBIOS_FILTER_TABLE  mSmbiosFilterType23BlackList[] = {
  85   {0x17, OFFSET_OF(SMBIOS_TABLE_TYPE23, ResetCount),          FIELD_SIZE_OF(SMBIOS_TABLE_TYPE23, ResetCount),          0},
  86 };
  87 SMBIOS_FILTER_TABLE  mSmbiosFilterType27BlackList[] = {
  88   {0x1B, OFFSET_OF(SMBIOS_TABLE_TYPE27, NominalSpeed),        FIELD_SIZE_OF(SMBIOS_TABLE_TYPE27, NominalSpeed),        0},
  89 };
  90 SMBIOS_FILTER_TABLE  mSmbiosFilterType39BlackList[] = {
  91   {0x27, OFFSET_OF(SMBIOS_TABLE_TYPE39, SerialNumber),        FIELD_SIZE_OF(SMBIOS_TABLE_TYPE39, SerialNumber),        SMBIOS_FILTER_TABLE_FLAG_IS_STRING},
  92   {0x27, OFFSET_OF(SMBIOS_TABLE_TYPE39, AssetTagNumber),      FIELD_SIZE_OF(SMBIOS_TABLE_TYPE39, AssetTagNumber),      SMBIOS_FILTER_TABLE_FLAG_IS_STRING},
  93   {0x27, OFFSET_OF(SMBIOS_TABLE_TYPE39, ModelPartNumber),     FIELD_SIZE_OF(SMBIOS_TABLE_TYPE39, ModelPartNumber),     SMBIOS_FILTER_TABLE_FLAG_IS_STRING},
  94 };
  95
  96 SMBIOS_FILTER_STRUCT  mSmbiosFilterStandardTableBlackList[] = {
  97   {0x01, mSmbiosFilterType1BlackList,  sizeof(mSmbiosFilterType1BlackList)/sizeof(mSmbiosFilterType1BlackList[0])},
  98   {0x02, mSmbiosFilterType2BlackList,  sizeof(mSmbiosFilterType2BlackList)/sizeof(mSmbiosFilterType2BlackList[0])},
  99   {0x03, mSmbiosFilterType3BlackList,  sizeof(mSmbiosFilterType3BlackList)/sizeof(mSmbiosFilterType3BlackList[0])},
 100   {0x04, mSmbiosFilterType4BlackList,  sizeof(mSmbiosFilterType4BlackList)/sizeof(mSmbiosFilterType4BlackList[0])},
 101   {0x0B, NULL, 0},
 102   {0x0F, NULL, 0},
 103   {0x11, mSmbiosFilterType17BlackList, sizeof(mSmbiosFilterType17BlackList)/sizeof(mSmbiosFilterType17BlackList[0])},
 104   {0x12, NULL, 0},
 105   {0x16, mSmbiosFilterType22BlackList, sizeof(mSmbiosFilterType22BlackList)/sizeof(mSmbiosFilterType22BlackList[0])},
 106   {0x17, mSmbiosFilterType23BlackList, sizeof(mSmbiosFilterType23BlackList)/sizeof(mSmbiosFilterType23BlackList[0])},
 107   {0x1B, mSmbiosFilterType27BlackList, sizeof(mSmbiosFilterType27BlackList)/sizeof(mSmbiosFilterType27BlackList[0])},
 108   {0x1F, NULL, 0},
 109   {0x21, NULL, 0},
 110   {0x27, mSmbiosFilterType39BlackList, sizeof(mSmbiosFilterType39BlackList)/sizeof(mSmbiosFilterType39BlackList[0])},
 111 };
 112
 113 EFI_SMBIOS_PROTOCOL *mSmbios;
 114 UINTN               mMaxLen;
 115
 116 /**
 117
 118   This function dump raw data.
 119
 120   @param  Data  raw data
 121   @param  Size  raw data size
 122
 123 **/
 124 VOID
 125 InternalDumpData (
 126   IN UINT8  *Data,
 127   IN UINTN  Size
 128   )
 129 {
 130   UINTN  Index;
 131   for (Index = 0; Index < Size; Index++) {
 132     DEBUG ((EFI_D_VERBOSE, "%02x", (UINTN)Data[Index]));
 133   }
 134 }
 135
 136 /**
 137
 138   This function dump raw data with colume format.
 139
 140   @param  Data  raw data
 141   @param  Size  raw data size
 142
 143 **/
 144 VOID
 145 InternalDumpHex (
 146   IN UINT8  *Data,
 147   IN UINTN  Size
 148   )
 149 {
 150   UINTN   Index;
 151   UINTN   Count;
 152   UINTN   Left;
 153
 154 #define COLUME_SIZE  (16 * 2)
 155
 156   Count = Size / COLUME_SIZE;
 157   Left  = Size % COLUME_SIZE;
 158   for (Index = 0; Index < Count; Index++) {
 159     DEBUG ((EFI_D_VERBOSE, "%04x: ", Index * COLUME_SIZE));
 160     InternalDumpData (Data + Index * COLUME_SIZE, COLUME_SIZE);
 161     DEBUG ((EFI_D_VERBOSE, "\n"));
 162   }
 163
 164   if (Left != 0) {
 165     DEBUG ((EFI_D_VERBOSE, "%04x: ", Index * COLUME_SIZE));
 166     InternalDumpData (Data + Index * COLUME_SIZE, Left);
 167     DEBUG ((EFI_D_VERBOSE, "\n"));
 168   }
 169 }
 170
 171
 172 /**
 173
 174   This function get filter structure by SMBIOS type.
 175
 176   @param  Type  SMBIOS type
 177
 178 **/
 179 SMBIOS_FILTER_STRUCT *
 180 GetFilterStructByType (
 181   IN UINT8 Type
 182   )
 183 {
 184   UINTN  Index;
 185   for (Index = 0; Index < sizeof(mSmbiosFilterStandardTableBlackList)/sizeof(mSmbiosFilterStandardTableBlackList[0]); Index++) {
 186     if (mSmbiosFilterStandardTableBlackList[Index].Type == Type) {
 187       return &mSmbiosFilterStandardTableBlackList[Index];
 188     }
 189   }
 190   return NULL;
 191 }
 192
 193 /**
 194
 195   This function get SMBIOS string in SMBIOS table.
 196
 197   @param  Head      SMBIOS table head
 198   @param  StringId  SMBIOS string ID
 199   @param  StringLen length of SMBIOS string
 200
 201   @return SMBIOS string data
 202 **/
 203 CHAR8 *
 204 GetSmbiosStringById (
 205   IN   EFI_SMBIOS_TABLE_HEADER          *Head,
 206   IN   SMBIOS_TABLE_STRING              StringId,
 207   OUT  UINTN                            *StringLen
 208   )
 209 {
 210   UINTN  Size;
 211   UINTN  StrLen;
 212   CHAR8  *CharInStr;
 213   UINTN  StringsNumber;
 214   CHAR8  *String;
 215
 216   CharInStr = (CHAR8 *)Head + Head->Length;
 217   Size = Head->Length;
 218   StringsNumber = 0;
 219   StrLen = 0;
 220   //
 221   // look for the two consecutive zeros, check the string limit by the way.
 222   //
 223   String = NULL;
 224   while (*CharInStr != 0 || *(CharInStr+1) != 0) {
 225     if (*CharInStr == 0) {
 226       Size += 1;
 227       CharInStr++;
 228     }
 229     String = CharInStr;
 230
 231     for (StrLen = 0 ; StrLen < mMaxLen; StrLen++) {
 232       if (*(CharInStr+StrLen) == 0) {
 233         break;
 234       }
 235     }
 236     *StringLen = StrLen;
 237
 238     if (StrLen == mMaxLen) {
 239       return NULL;
 240     }
 241
 242     //
 243     // forward the pointer
 244     //
 245     CharInStr += StrLen;
 246     Size += StrLen;
 247     StringsNumber += 1;
 248     if (StringsNumber == StringId) {
 249       break;
 250     }
 251   }
 252
 253   return String;
 254 }
 255
 256 /**
 257
 258   This function update SMBIOS table based on policy.
 259
 260   @param  TableEntry      SMBIOS table
 261   @param  TableEntrySize  SMBIOS table size
 262
 263 **/
 264 VOID
 265 FilterSmbiosEntry (
 266   IN OUT VOID   *TableEntry,
 267   IN UINTN      TableEntrySize
 268   )
 269 {
 270   SMBIOS_FILTER_STRUCT  *FilterStruct;
 271   SMBIOS_FILTER_TABLE   *Filter;
 272   UINTN                 Index;
 273   SMBIOS_TABLE_STRING   StringId;
 274   CHAR8                 *String;
 275   UINTN                 StringLen;
 276
 277   DEBUG ((EFI_D_INFO, "Smbios Table (Type - %d):\n", ((SMBIOS_STRUCTURE *)TableEntry)->Type));
 278   DEBUG_CODE (InternalDumpHex (TableEntry, TableEntrySize););
 279
 280   FilterStruct = GetFilterStructByType (((SMBIOS_STRUCTURE *)TableEntry)->Type);
 281   if (FilterStruct != NULL) {
 282     if (FilterStruct->Filter == NULL || FilterStruct->FilterCount == 0) {
 283       // zero all table entries, except header
 284       ZeroMem ((UINT8 *)TableEntry + sizeof(SMBIOS_STRUCTURE), TableEntrySize - sizeof(SMBIOS_STRUCTURE));
 285     } else {
 286       Filter = FilterStruct->Filter;
 287       for (Index = 0; Index < FilterStruct->FilterCount; Index++) {
 288         if (((SMBIOS_STRUCTURE *) TableEntry)->Length >= (Filter[Index].Offset + Filter[Index].Size)) {
 289           //
 290           // The field is present in the SMBIOS entry.
 291           //
 292           if ((Filter[Index].Flags & SMBIOS_FILTER_TABLE_FLAG_IS_STRING) != 0) {
 293             CopyMem (&StringId, (UINT8 *)TableEntry + Filter[Index].Offset, sizeof(StringId));
 294             if (StringId != 0) {
 295               // set ' ' for string field
 296               String = GetSmbiosStringById (TableEntry, StringId, &StringLen);
 297               ASSERT (String != NULL);
 298               //DEBUG ((EFI_D_INFO,"StrId(0x%x)-%a(%d)\n", StringId, String, StringLen));
 299               SetMem (String, StringLen, ' ');
 300             }
 301           }
 302           // zero non-string field
 303           ZeroMem ((UINT8 *)TableEntry + Filter[Index].Offset, Filter[Index].Size);
 304         }
 305       }
 306     }
 307   }
 308
 309   DEBUG ((EFI_D_INFO, "Filter Smbios Table (Type - %d):\n", ((SMBIOS_STRUCTURE *)TableEntry)->Type));
 310   DEBUG_CODE (InternalDumpHex (TableEntry, TableEntrySize););
 311 }
 312
 313 /**
 314
 315   Get the full size of SMBIOS structure including optional strings that follow the formatted structure.
 316
 317   @param Head                   Pointer to the beginning of SMBIOS structure.
 318   @param NumberOfStrings        The returned number of optional strings that follow the formatted structure.
 319
 320   @return Size                  The returned size.
 321 **/
 322 UINTN
 323 GetSmbiosStructureSize (
 324   IN   EFI_SMBIOS_TABLE_HEADER          *Head,
 325   OUT  UINTN                            *NumberOfStrings
 326   )
 327 {
 328   UINTN  Size;
 329   UINTN  StrLen;
 330   CHAR8  *CharInStr;
 331   UINTN  StringsNumber;
 332
 333   CharInStr = (CHAR8 *)Head + Head->Length;
 334   Size = Head->Length;
 335   StringsNumber = 0;
 336   StrLen = 0;
 337   //
 338   // look for the two consecutive zeros, check the string limit by the way.
 339   //
 340   while (*CharInStr != 0 || *(CharInStr+1) != 0) {
 341     if (*CharInStr == 0) {
 342       Size += 1;
 343       CharInStr++;
 344     }
 345
 346     for (StrLen = 0 ; StrLen < mMaxLen; StrLen++) {
 347       if (*(CharInStr+StrLen) == 0) {
 348         break;
 349       }
 350     }
 351
 352     if (StrLen == mMaxLen) {
 353       return 0;
 354     }
 355
 356     //
 357     // forward the pointer
 358     //
 359     CharInStr += StrLen;
 360     Size += StrLen;
 361     StringsNumber += 1;
 362   }
 363
 364   //
 365   // count ending two zeros.
 366   //
 367   Size += 2;
 368
 369   if (NumberOfStrings != NULL) {
 370     *NumberOfStrings = StringsNumber;
 371   }
 372   return Size;
 373 }
 374
 375 /**
 376
 377   This function returns full SMBIOS table length.
 378
 379   @param  TableAddress      SMBIOS table based address
 380   @param  TableMaximumSize  Maximum size of SMBIOS table
 381
 382   @return SMBIOS table length
 383
 384 **/
 385 UINTN
 386 GetSmbiosTableLength (
 387   IN VOID  *TableAddress,
 388   IN UINTN TableMaximumSize
 389   )
 390 {
 391   VOID  *TableEntry;
 392   VOID  *TableAddressEnd;
 393   UINTN TableEntryLength;
 394
 395   TableAddressEnd = (VOID *)((UINTN)TableAddress + TableMaximumSize);
 396   TableEntry = TableAddress;
 397   while (TableEntry < TableAddressEnd) {
 398     TableEntryLength = GetSmbiosStructureSize (TableEntry, NULL);
 399     if (TableEntryLength == 0) {
 400       break;
 401     }
 402     if (((SMBIOS_STRUCTURE *)TableEntry)->Type == 127) {
 403       TableEntry = (VOID *)((UINTN)TableEntry + TableEntryLength);
 404       break;
 405     }
 406     TableEntry = (VOID *)((UINTN)TableEntry + TableEntryLength);
 407   }
 408
 409   return ((UINTN)TableEntry - (UINTN)TableAddress);
 410 }
 411
 412 /**
 413
 414   This function updatess full SMBIOS table length.
 415
 416   @param  TableAddress      SMBIOS table based address
 417   @param  TableLength       SMBIOS table length
 418
 419 **/
 420 VOID
 421 FilterSmbiosTable (
 422   IN OUT VOID  *TableAddress,
 423   IN UINTN     TableLength
 424   )
 425 {
 426   VOID   *TableAddressEnd;
 427   VOID   *TableEntry;
 428   UINTN  TableEntryLength;
 429
 430   TableEntry = TableAddress;
 431   TableAddressEnd = (VOID *)((UINTN)TableAddress + TableLength);
 432   while ((UINTN)TableEntry < (UINTN)TableAddressEnd) {
 433     TableEntryLength = GetSmbiosStructureSize (TableEntry, NULL);
 434     if (TableEntryLength == 0) {
 435       break;
 436     }
 437
 438     FilterSmbiosEntry (TableEntry, TableEntryLength);
 439
 440     TableEntry = (VOID *)((UINTN)TableEntry + TableEntryLength);
 441   }
 442 }
 443
 444 /**
 445   Measure SMBIOS with EV_EFI_HANDOFF_TABLES to PCR[1].
 446
 447   @param[in] Event      Event whose notification function is being invoked.
 448   @param[in] Context    Pointer to the notification function's context.
 449
 450 **/
 451 VOID
 452 EFIAPI
 453 MeasureSmbiosTable (
 454   IN      EFI_EVENT                 Event,
 455   IN      VOID                      *Context
 456   )
 457 {
 458   EFI_STATUS                        Status;
 459   EFI_HANDOFF_TABLE_POINTERS        HandoffTables;
 460   SMBIOS_TABLE_ENTRY_POINT          *SmbiosTable;
 461   SMBIOS_TABLE_3_0_ENTRY_POINT      *Smbios3Table;
 462   VOID                              *SmbiosTableAddress;
 463   VOID                              *TableAddress;
 464   UINTN                             TableLength;
 465
 466   SmbiosTable = NULL;
 467   Smbios3Table = NULL;
 468   SmbiosTableAddress = NULL;
 469   TableLength = 0;
 470
 471   if (mSmbios->MajorVersion >= 3) {
 472     Status = EfiGetSystemConfigurationTable (
 473                &gEfiSmbios3TableGuid,
 474                (VOID **) &Smbios3Table
 475                );
 476     if (!EFI_ERROR (Status)) {
 477       DEBUG ((EFI_D_INFO, "Smbios3Table:\n"));
 478       DEBUG ((EFI_D_INFO, "  AnchorString                - '%c%c%c%c%c'\n",
 479         Smbios3Table->AnchorString[0],
 480         Smbios3Table->AnchorString[1],
 481         Smbios3Table->AnchorString[2],
 482         Smbios3Table->AnchorString[3],
 483         Smbios3Table->AnchorString[4]
 484         ));
 485       DEBUG ((EFI_D_INFO, "  EntryPointStructureChecksum - 0x%02x\n", Smbios3Table->EntryPointStructureChecksum));
 486       DEBUG ((EFI_D_INFO, "  EntryPointLength            - 0x%02x\n", Smbios3Table->EntryPointLength));
 487       DEBUG ((EFI_D_INFO, "  MajorVersion                - 0x%02x\n", Smbios3Table->MajorVersion));
 488       DEBUG ((EFI_D_INFO, "  MinorVersion                - 0x%02x\n", Smbios3Table->MinorVersion));
 489       DEBUG ((EFI_D_INFO, "  DocRev                      - 0x%02x\n", Smbios3Table->DocRev));
 490       DEBUG ((EFI_D_INFO, "  EntryPointRevision          - 0x%02x\n", Smbios3Table->EntryPointRevision));
 491       DEBUG ((EFI_D_INFO, "  TableMaximumSize            - 0x%08x\n", Smbios3Table->TableMaximumSize));
 492       DEBUG ((EFI_D_INFO, "  TableAddress                - 0x%016lx\n", Smbios3Table->TableAddress));
 493     }
 494   }
 495
 496   if (Smbios3Table == NULL) {
 497     Status = EfiGetSystemConfigurationTable (
 498                &gEfiSmbiosTableGuid,
 499                (VOID **) &SmbiosTable
 500                );
 501     if (!EFI_ERROR (Status)) {
 502       DEBUG ((EFI_D_INFO, "SmbiosTable:\n"));
 503       DEBUG ((EFI_D_INFO, "  AnchorString                - '%c%c%c%c'\n",
 504         SmbiosTable->AnchorString[0],
 505         SmbiosTable->AnchorString[1],
 506         SmbiosTable->AnchorString[2],
 507         SmbiosTable->AnchorString[3]
 508         ));
 509       DEBUG ((EFI_D_INFO, "  EntryPointStructureChecksum - 0x%02x\n", SmbiosTable->EntryPointStructureChecksum));
 510       DEBUG ((EFI_D_INFO, "  EntryPointLength            - 0x%02x\n", SmbiosTable->EntryPointLength));
 511       DEBUG ((EFI_D_INFO, "  MajorVersion                - 0x%02x\n", SmbiosTable->MajorVersion));
 512       DEBUG ((EFI_D_INFO, "  MinorVersion                - 0x%02x\n", SmbiosTable->MinorVersion));
 513       DEBUG ((EFI_D_INFO, "  MaxStructureSize            - 0x%08x\n", SmbiosTable->MaxStructureSize));
 514       DEBUG ((EFI_D_INFO, "  EntryPointRevision          - 0x%02x\n", SmbiosTable->EntryPointRevision));
 515       DEBUG ((EFI_D_INFO, "  FormattedArea               - '%c%c%c%c%c'\n",
 516         SmbiosTable->FormattedArea[0],
 517         SmbiosTable->FormattedArea[1],
 518         SmbiosTable->FormattedArea[2],
 519         SmbiosTable->FormattedArea[3],
 520         SmbiosTable->FormattedArea[4]
 521         ));
 522       DEBUG ((EFI_D_INFO, "  IntermediateAnchorString    - '%c%c%c%c%c'\n",
 523         SmbiosTable->IntermediateAnchorString[0],
 524         SmbiosTable->IntermediateAnchorString[1],
 525         SmbiosTable->IntermediateAnchorString[2],
 526         SmbiosTable->IntermediateAnchorString[3],
 527         SmbiosTable->IntermediateAnchorString[4]
 528         ));
 529       DEBUG ((EFI_D_INFO, "  IntermediateChecksum        - 0x%02x\n", SmbiosTable->IntermediateChecksum));
 530       DEBUG ((EFI_D_INFO, "  TableLength                 - 0x%04x\n", SmbiosTable->TableLength));
 531       DEBUG ((EFI_D_INFO, "  TableAddress                - 0x%08x\n", SmbiosTable->TableAddress));
 532       DEBUG ((EFI_D_INFO, "  NumberOfSmbiosStructures    - 0x%04x\n", SmbiosTable->NumberOfSmbiosStructures));
 533       DEBUG ((EFI_D_INFO, "  SmbiosBcdRevision           - 0x%02x\n", SmbiosTable->SmbiosBcdRevision));
 534     }
 535   }
 536
 537   if (Smbios3Table != NULL) {
 538     SmbiosTableAddress = (VOID *)(UINTN)Smbios3Table->TableAddress;
 539     TableLength = GetSmbiosTableLength (SmbiosTableAddress, Smbios3Table->TableMaximumSize);
 540   } else if (SmbiosTable != NULL) {
 541     SmbiosTableAddress = (VOID *)(UINTN)SmbiosTable->TableAddress;
 542     TableLength = SmbiosTable->TableLength;
 543   }
 544
 545   if (SmbiosTableAddress != NULL) {
 546     DEBUG ((DEBUG_INFO, "The Smbios Table starts at: 0x%x\n", SmbiosTableAddress));
 547     DEBUG ((DEBUG_INFO, "The Smbios Table size: 0x%x\n", TableLength));
 548     DEBUG_CODE (InternalDumpHex ((UINT8 *)(UINTN)SmbiosTableAddress, TableLength););
 549
 550     TableAddress = AllocateCopyPool ((UINTN)TableLength, (VOID *)(UINTN)SmbiosTableAddress);
 551     if (TableAddress == NULL) {
 552       return ;
 553     }
 554
 555     FilterSmbiosTable (TableAddress, TableLength);
 556
 557     DEBUG ((DEBUG_INFO, "The final Smbios Table starts at: 0x%x\n", TableAddress));
 558     DEBUG ((DEBUG_INFO, "The final Smbios Table size: 0x%x\n", TableLength));
 559     DEBUG_CODE (InternalDumpHex (TableAddress, TableLength););
 560
 561     HandoffTables.NumberOfTables = 1;
 562     if (Smbios3Table != NULL) {
 563       CopyGuid (&(HandoffTables.TableEntry[0].VendorGuid), &gEfiSmbios3TableGuid);
 564       HandoffTables.TableEntry[0].VendorTable = Smbios3Table;
 565     } else {
 566       CopyGuid (&(HandoffTables.TableEntry[0].VendorGuid), &gEfiSmbiosTableGuid);
 567       HandoffTables.TableEntry[0].VendorTable = SmbiosTable;
 568     }
 569     Status = TpmMeasureAndLogData (
 570                1,                       // PCRIndex
 571                EV_EFI_HANDOFF_TABLES,   // EventType
 572                &HandoffTables,          // EventLog
 573                sizeof (HandoffTables),  // LogLen
 574                TableAddress,            // HashData
 575                TableLength              // HashDataLen
 576                );
 577     if (EFI_ERROR (Status)) {
 578       return ;
 579     }
 580   }
 581
 582   return ;
 583 }
 584
 585 /**
 586
 587   Driver to produce Smbios measurement.
 588
 589   @param ImageHandle     Module's image handle
 590   @param SystemTable     Pointer of EFI_SYSTEM_TABLE
 591
 592   @return Status returned from EfiCreateEventReadyToBootEx().
 593
 594 **/
 595 EFI_STATUS
 596 EFIAPI
 597 SmbiosMeasurementDriverEntryPoint (
 598   IN EFI_HANDLE           ImageHandle,
 599   IN EFI_SYSTEM_TABLE     *SystemTable
 600   )
 601 {
 602   EFI_STATUS            Status;
 603   EFI_EVENT             Event;
 604
 605   Status = gBS->LocateProtocol (&gEfiSmbiosProtocolGuid, NULL, (VOID **) &mSmbios);
 606   ASSERT_EFI_ERROR (Status);
 607   DEBUG ((DEBUG_INFO, "The Smbios Table Version: %x.%x\n", mSmbios->MajorVersion, mSmbios->MinorVersion));
 608
 609   if (mSmbios->MajorVersion < 2 || (mSmbios->MajorVersion == 2 && mSmbios->MinorVersion < 7)){
 610     mMaxLen = SMBIOS_STRING_MAX_LENGTH;
 611   } else if (mSmbios->MajorVersion < 3) {
 612     //
 613     // Reference SMBIOS 2.7, chapter 6.1.3, it will have no limit on the length of each individual text string.
 614     // However, the length of the entire structure table (including all strings) must be reported
 615     // in the Structure Table Length field of the SMBIOS Structure Table Entry Point,
 616     // which is a WORD field limited to 65,535 bytes.
 617     //
 618     mMaxLen = SMBIOS_TABLE_MAX_LENGTH;
 619   } else {
 620     //
 621     // SMBIOS 3.0 defines the Structure table maximum size as DWORD field limited to 0xFFFFFFFF bytes.
 622     // Locate the end of string as long as possible.
 623     //
 624     mMaxLen = SMBIOS_3_0_TABLE_MAX_LENGTH;
 625   }
 626
 627   //
 628   // Measure Smbios tables
 629   //
 630   Status = EfiCreateEventReadyToBootEx (
 631              TPL_CALLBACK,
 632              MeasureSmbiosTable,
 633              NULL,
 634              &Event
 635              );
 636
 637   return Status;
 638 }